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Càlcul mental
Contributed by: Perez
  • 1. 12*12
A) 121
B) 144
C) 24
D) 122
  • 2. 13*13
A) 256
B) 121
C) 169
D) 196
  • 3. 15*15
A) 225
B) 256
C) 30
D) 1515
  • 4. 17*17
A) 169
B) 361
C) 289
D) 298
  • 5. 20*20
A) 400
B) 200
C) 40
D) 20
  • 6. 19*19
A) 39
B) 361
C) 261
D) 121
  • 7. 14+14
A) 28
B) 256
C) 196
D) 144
  • 8. 11*13
A) 145
B) 153
C) 143
D) 133
  • 9. 18*18
A) 324
B) 264
C) 364
D) 164
  • 10. 11*11
A) 121
B) 22
C) 1111
D) 111
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